1/100 probability, based off infinite trials.

Okay soo i was reading around on probabilities and i found a page where it talks about probabilities, 1/100 and what are the chances that the 1/100 thing occurs. I couldnt help but feel this is wrong because probabilities in general are based off an infinite amount of trials assuming that its always the best possible outcome.

A crate has a 1% chance to have a special item. That means that according to an infinite amount of trials, and best possible outcome, 1/100 crates will have a special item in them. Even though the probability doesnt change, the best possible outcome would suggest that this would always happen in an infinite trail.